determine_builtin_support.h

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/******************************************************************************
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Embedded Template Library.
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Copyright(c) 2021 John Wellbelove
 
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#ifndef ETL_DETERMINE_BUILTIN_SUPPORT_H_INCLUDED
#define ETL_DETERMINE_BUILTIN_SUPPORT_H_INCLUDED
 
#if defined(ETL_USE_TYPE_TRAITS_BUILTINS) // Set all of them to be true if not already defined
  #if !defined(ETL_USING_BUILTIN_IS_ASSIGNABLE)
    #define ETL_USING_BUILTIN_IS_ASSIGNABLE 1
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_CONSTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_CONSTRUCTIBLE 1
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE 1
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE 1
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE 1
  #endif
 
  #if !defined(ETL_USING_BUILTIN_UNDERLYING_TYPE)
    #define ETL_USING_BUILTIN_UNDERLYING_TYPE 1
  #endif
#endif
 
#if defined(__has_builtin) && !defined(ETL_COMPILER_MICROSOFT) // Use __has_builtin to check for existence of builtin functions? Fix VS2022 intellisense issue.
  #if !defined(ETL_USING_BUILTIN_IS_ASSIGNABLE)
    #define ETL_USING_BUILTIN_IS_ASSIGNABLE __has_builtin(__is_assignable)
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_CONSTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_CONSTRUCTIBLE __has_builtin(__is_constructible)
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE (__has_builtin(__has_trivial_constructor) || __has_builtin(__is_trivially_constructible))
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE (__has_builtin(__has_trivial_destructor) || __has_builtin(__is_trivially_destructible))
  #endif
 
  #if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE)
    #define ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE (__has_builtin(__has_trivial_copy) || __has_builtin(__is_trivially_copyable))
  #endif
 
  #if !defined(ETL_USING_BUILTIN_UNDERLYING_TYPE)
    #define ETL_USING_BUILTIN_UNDERLYING_TYPE __has_builtin(__underlying_type)
  #endif
#endif
 
// The default. Set to 0, if not already set.
#if !defined(ETL_USING_BUILTIN_IS_ASSIGNABLE)
  #define ETL_USING_BUILTIN_IS_ASSIGNABLE 0
#endif
 
#if !defined(ETL_USING_BUILTIN_IS_CONSTRUCTIBLE)
  #define ETL_USING_BUILTIN_IS_CONSTRUCTIBLE 0
#endif
 
#if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE)
  #define ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE 0
#endif
 
#if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE)
  #define ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE 0
#endif
 
#if !defined(ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE)
  #define ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE 0
#endif
 
#if !defined(ETL_USING_BUILTIN_UNDERLYING_TYPE)
  #define ETL_USING_BUILTIN_UNDERLYING_TYPE 0
#endif
 
namespace etl
{
  namespace traits
  {
    // Documentation: https://www.etlcpp.com/etl_traits.html
 
    static ETL_CONSTANT bool using_builtin_is_assignable              = (ETL_USING_BUILTIN_IS_ASSIGNABLE == 1);
    static ETL_CONSTANT bool using_builtin_is_constructible           = (ETL_USING_BUILTIN_IS_CONSTRUCTIBLE == 1);
    static ETL_CONSTANT bool using_builtin_is_trivially_constructible = (ETL_USING_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE == 1);
    static ETL_CONSTANT bool using_builtin_is_trivially_destructible  = (ETL_USING_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE == 1);
    static ETL_CONSTANT bool using_builtin_is_trivially_copyable      = (ETL_USING_BUILTIN_IS_TRIVIALLY_COPYABLE == 1);
    static ETL_CONSTANT bool using_builtin_underlying_type            = (ETL_USING_BUILTIN_UNDERLYING_TYPE == 1);
  }
}
 
#endif